<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
    <style>
      table {
        width: 500px;
        margin: 100px auto;
        border-collapse: collapse;
        text-align: center;
      }

      td,
      th {
        border: 1px solid #333;
      }

      thead tr {
        height: 40px;
        background-color: #ccc;
      }
    </style>
  </head>

  <body>
    <table cellspacing="0">
      <thead>
        <tr>
          <th>姓名</th>
          <th>科目</th>
          <th>成绩</th>
          <th>操作</th>
        </tr>
      </thead>
      <tbody></tbody>
    </table>
    <script>
      // 1.先去准备好学生的数据
      var datas = [
        {
          name: '魏璎珞',
          subject: 'JavaScript',
          score: 100,
        },
        {
          name: '弘历',
          subject: 'JavaScript',
          score: 98,
        },
        {
          name: '傅恒',
          subject: 'JavaScript',
          score: 99,
        },
        {
          name: '明玉',
          subject: 'JavaScript',
          score: 88,
        },
        {
          name: '大猪蹄子',
          subject: 'JavaScript',
          score: 0,
        },
      ]
      var tbd = document.querySelector('tbody')
      for (i = 0; i < datas.length; i++) {
        var tr = document.createElement('tr')
        tbd.appendChild(tr)
        for (var k in datas[i]) {
          var td = document.createElement('td')
          td.innerHTML = datas[i][k]
          tr.appendChild(td)
        }
        var td = document.createElement('td')
        td.innerHTML = `<a href='javaScript:;' onclick = del(this)>删除</a>`
        tr.appendChild(td)
      }
      function del(obj) {
        obj.parentNode.parentNode.remove()
      }
    </script>
  </body>
</html>
